The Evolution of Forensic Science
Published on Nov 27, 2015
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The Evolution of Forensic Science
Forensic science is the scientific method of gathering and examining information about the past, which is then used in a court of law.
Photo by West Midlands Police
The Evolution of Forensic Science
- Fingerprinting was the first application of forensic science. The ancient Chinese used fingerprints to identity documents and clay sculptures in the 700s. They did it without any formal classification system though.
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The Evolution of Forensic Science
- In 1784, physical matching of evidence was used to solve a murder case. A man by the name of John Toms had a piece of newspaper in his pocket that matched a piece of newspaper that was found in the gun as a wad.
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The Evolution of Forensic Science
- Valentin Ross developed a method of detecting arsenic in a victim's stomach in 1806. This advanced the investigation of deaths by poison.
The Evolution of Forensic Science
- Investigations into blood markers was introduced by Karl Landsteiner in 1901. He put blood into groups A, B, and O. He then worked with another man and was able to replicate their earlier work with blood typing and found similar results. The world of forensic science gain new knowledge about a crime through blood and body fluids.
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The Evolution of Forensic Science
- Nine years later, in 1910, they studied the hairs of animals. This lead to hair identification for solving crimes. The first case of hair identification was to convict a Frenchwoman of murder.
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The Evolution of Forensic Science
- Voice can be recorded on an instrument called a sound spectrograph. Therefore, in the 1960's, when they figured this out they started using voiceprints as evidence. Samples of recordings on phones, answering machines, and tape recorders could be used as evidence.
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The Evolution of Forensic Science
- DNA evidence use to take between 6 and 8 weeks. In 2001, a new technology sped up DNA profiling time to between 1 and 2 days. In the future, they want every state and other countries to have data samples in a databank that's connected in an international network. Also, DNA analysis might also be conducted at the crime scene by using hand-held DNA analyzers.
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